MAX7420:五阶、低通、开关电容滤波器

The MAX7418–MAX7425 5th-order, low-pass, switched-capacitor filters (SCFs) operate from a single +5V (MAX7418–MAX7421) or +3V (MAX7422–MAX7425) supply. These devices draw only 3mA of supply current and allow corner frequencies from 1Hz to 45kHz, making them ideal for low-power post-DAC filtering and anti-aliasing applications. They feature a shutdown mode that reduces supply current to 0.2µA. Two clocking options are available: self-clocking (through the use of an external capacitor), or external clocking for tighter corner-frequency control. An offset adjust pin allows for adjustment of the DC output level. The MAX7418/MAX7422 deliver 53dB of stopband rejection and a sharp rolloff with a 1.6 transition ratio. The MAX7421/MAX7425 achieve a sharper rolloff with a 1.25 transition ratio while still providing 37dB of stopband rejection. The MAX7419/MAX7423 Bessel filters provide low overshoot and fast settling, and the MAX7420/MAX7424 Butterworth filters provide a maximally flat passband response. Their fixed response simplifies the design task of selecting a clock frequency.

关键特性
  • 5th-Order, Lowpass Filters
    • Elliptic Response (MAX7418/MAX7421/MAX7422/MAX7425)
    • Bessel Response (MAX7419/MAX7423)
    • Butterworth Response (MAX7420/MAX7424)
  • Clock-Turnable Corner Frequency (1Hz to 45kHz)
  • Single-Supply Operation
    • +5V (MAX7418–MAX7421)
    • +3V (MAX7422–MAX7425)
  • Low Power
    • 3mA (Operating Mode)
    • 0.2µA (Shutdown Mode)
  • Available in 8-Pin µMAX® Package
  • Low Output Offset: ±4mV
MAX7418、MAX7419、MAX7420、MAX7421、MAX7422、MAX7423、MAX7424、MAX7425:典型工作电路
MAX7418、MAX7419、MAX7420、MAX7421、MAX7422、MAX7423、MAX7424、MAX7425:典型工作电路
应用
  • ADC抗混叠
  • CT2基站
  • DAC后置滤波
  • 语音处理
数据手册DataSheet
语言下载文件备注
英文MAX7418-MAX7425.pdfRev 0; 11/2000
关键参数
Part NumberFilter SectionsOrder Per Filter SectionFilter ClassFilter TypeFilter CharacteristicProgram MethodLowest Cutoff
(Hz)
Highest Cutoff
(kHz)
VSUPPLY
(V)
Design ToolsOper. Temp.
(°C)
Package/PinsBudgetary
Price
maxminSee Notes
MAX741815Switched CapLowpassEllipticClock1305EE-Sim
  • -40 to +85
  • 0 to +70
µMAX/8$3.66 @1k
MAX7419Bessel305µMAX/8$2.92 @1k
MAX7420Butterworth305µMAX/8$3.69 @1k
MAX7421Elliptic305µMAX/8$2.78 @1k
MAX7422Elliptic453µMAX/8$2.92 @1k
MAX7423Bessel453µMAX/8$2.92 @1k
MAX7424Butterworth453µMAX/8$2.92 @1k
MAX7425Elliptic453µMAX/8$2.92 @1k
开发工具
技术资料
相关产品
  • MAX7408:五阶、低通、椭圆函数、开关电容滤波器
  • MAX7411:五阶、低通、椭圆函数、开关电容滤波器
  • MAX7415:五阶、低通、椭圆函数、开关电容滤波器
  • MAX7412:五阶、低通、椭圆函数、开关电容滤波器
  • MAX7413:五阶、低通、开关电容滤波器
  • MAX7410:五阶、低通、开关电容滤波器
  • MAX7414:五阶、低通、开关电容滤波器
  • MAX7409:五阶、低通、开关电容滤波器
订购型号
型号状况推荐替代产品封装温度RoHS/无铅
MAX7420CUA停止供货MAX7420CUA+µMAX,;8引脚;15.6mm²0°C至+70°CRoHS/无铅:否
MAX7420CUA+生产中µMAX,;8引脚;15.6mm²0°C至+70°CRoHS/无铅:无铅
MAX7420CUA+T生产中µMAX,;8引脚;15.6mm²0°C至+70°CRoHS/无铅:无铅
MAX7420CUA-T停止供货MAX7420CUA+TµMAX,;8引脚;15.6mm²0°C至+70°CRoHS/无铅:否
MAX7420EUA停止供货MAX7420EUA+µMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:否
MAX7420EUA+生产中µMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:无铅
MAX7420EUA+T生产中µMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:无铅
MAX7420EUA-T停止供货MAX7420EUA+TµMAX,;8引脚;15.6mm²-40°C至+85°CRoHS/无铅:否
MAX7418-MAX7425.pdf MAX7425
Reduce the Chances of Human Error: Part 2, Super Amps and Filters for Analog Interface MAX5492
MAX7418-MAX7425.pdf MAX7425